Penicillium notatum stops the growth of

Microbes like $Spirulina$ can be grown on materials like:
$I$. Waste water from potato processing plants
$II$. Straw
$III$. Animal manure and sewage
$IV$. Molasses
Choose the correct option.

Who coined the term 'antibiotic'?

Which one of the following organisms is used as an indicator of water quality?

Male mosquitoes feed on which of the following?

The chemical substances which are produced by some microbes and can kill or retard the growth of other microbes are known as: